World Environment Day?

What is World Environment Day? Led by the United Nations Environment Programme (UNEP) and held annually on 5 June since 1973, World Environment Day is the largest global platform for environmental public outreach and is celebrated by millions of people across the world. This year it is hosted by Sweden. Where did #OnlyOneEarth come from? “Only One Earth” was the slogan for the first United Nations Conference on the Human Environment, held in Stockholm in 1972. This put sustainable development on the global agenda and led to the establishment of World Environment Day. Fifty years later, Sweden is hosting Stockholm+50 from 2 to 3 June, and World Environment Day on 5 June. Why take part? Time is running out, and nature is in emergency mode. To keep global warming below 1.5°C this century, we must halve annual greenhouse gas emissions by 2030. Without action, exposure to air pollution beyond safe guidelines will increase by 50 per cent within the decade and plastic waste flowing into aquatic ecosystems will nearly triple by 2040. We need urgent action to address these pressing issues, making “Only One Earth” and its focus on living sustainably in harmony with nature, as pertinent as ever. Making sustainable living the default option Truly transformative options towards sustainability need to be available, affordable and attractive for people to make better daily decisions. Key areas for transformation include how we build and live in our homes, cities and places of work and worship, how and where our money is invested, and what we do for fun. But others of greater magniture also include: energy, production systems, global trade and transport systems, and protection of biodiversity. Many of these options can only be created by larger entities: national and sub-national governments, financial institutions, businesses, international organizations, and other organizations with the power to rewrite the rules, frame our ambition and open up new horizons. Nevertherless, individuals and civil society are pivotal advocates, awareness-raisers and supporters. The more we raise our voices, emphasize what needs to be done and point out who is responsible, the faster change will come. By supporting World Environment Day 2022 and the #OnlyOneEarth campaign, you can help ensure this unique and beautiful planet remains a comfortable home for humanity. Did you know? We are using the equivalent of 1.6 Earths to maintain our current way of life, and ecosystems cannot keep up with our demands. Our lifestyles are associated with two thirds of all greenhouse gas emissions - studies show that sustainable lifestyles and behaviours could reduce our emissions by 40 to 70% by 2050. Sustainable consumption and production can drive economic development, mitigate climate change, positively impact health and pollution, and help alleviate poverty – potentially increasing incomes by an average of 11% in low- and medium-income countries by 2060, and 4% in high-income countries.

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Communication Skills-

INTRODUCTION Communication: Communication is the concept of sharing/exchanging of information/idea by writing, speaking or any other medium. It is a two-way process. Communication skills are often used in organization/business, home or at workspace by using soft skills. It is a way to represent yourself in front of other parties efficiently and effectively. For example, After completion of your educational qualification, when you apply for a job, you need to communicate for sending an email. Communication is performed from Birth to Death in everyone's life. TYPES OF COMMUNICATION Communication can be categorised in three ways: (1) Verbal Communication (2) Non-Verbal Communication (3) Visual Communication 1. Verbal Communication: It is a method to communicate by using speech or words. It is a basic type of medium which is used in family, friends and relatives. Verbal communication has the requirement to learn a specific language which is understood by both parties. It ...

Question-About Frustum

Question=A metallic right circular cone 20 cm high and whose vertical angle is 60° is cut into two parts at the middle of its height by a plane, parallel to its base. If the frustum so obtained, be drawn into a wire of diameter1/16 cm, find the length of the wire. Solution=Let VAB be the solid metallic right circular cone of height 20 cm. Suppose, this cone is cut by a plane parallel to its base at a point O' such that V O^ prime =0^ prime 0,i i.e. O' is the mid-point of VO. Let r1and r2 be the radii of circular ends of the frustum ABB'A'. In right triangles VOA and VO'A', we have tan 30 deg = (OA)/(VO) and tan 30 deg = O^ prime A^ prime VO^ prime 1(sqrt(3)) = r 1 20 : and 1/(sqrt(3)) = r_{2}/10 r_{1} = 20/(sqrt(3)) * cmi and r_{2} = 10/(sqrt(3)) cm Volume of the frustum = 1/3 * pi(r_{1} ^ 2 + r_{2} ^ 2 + r_{1}*r_{2}) * h Volume of the frustum = pi/3 * (400/3 + 100/3 + 200/3) * 10c * m ^ 3 = 7000/9 * pi*c * m ^ 3 Let the length of the wire of 1/16cm di...

Reflection of Light-

REFLECTION OF LIGHT The phenomenon of bouncing off the light in the same medium, when it falls on a polished or shiny surface, is called reflection of light. Example: A mirror, polished surface of metal, etc., reflects (or bounces off) most of the light falling or incident on it, as shown in figure 1.2. Where, i = Incident angle, PO = Incident ray, MN= Plane mirror, ON = Normal, r = Angle of reflection, 0Q= Reflected ray, o = Incident point. Laws of Reflection of Light (a) Angle of incidence (i) is always equal to angle of reflection (r). angle i = angle r, and (b) Incident ray, reflected ray and normal to the mirror at the point of incidence all the three lie in the same plane. These two laws of reflection of light are applicable for all kind of mirrors such as spherical mirror, plane mirror, curved mirror.

CNG and Nano Carbon

1. The natural gas (CNG)-run buses are harmful for humans as they emit 'nano carbon' particles which can cause cancer, according to a study conducted by council of scientific and industrial research (CSIR). 2.Through the study was conducted on a very limited sample size in Delhi,CSIR took the findings seriously owing to the health hazard,it poses to humans and alerted the central government for further follow up,CSIR's Director General Dr MO Garg said. 3. According to him,the study can change the perception that natural gas is a clean fuel as it does not emit any visible smoke,which is in contrast to smoke emitted by diesel-run vehicles and perceived as harmful for humans. 4. "Natural gas is supposed to be a clean fuel when used in internal combustion engines,right? But,I don't think people realise that what you see (smoke) is perhaps better than what you don't see (no smoke from CNG vehicles)," said Garg during his address at the Global Green Energy Conc...

Light-

LIGHT Light is a kind of energy, which travels in the form of electromagnetic waves and produces sensation in our eyes. An object reflects light incident on it and this reflected light received by our eyes, makes us able to see the things around us. "In this way things are classified in two ways on the basis of reflection of light." (i) Luminous bodies: Those bodies which produce light, are called luminous bodies, e.g., electric bulb, sun, etc. (ii) Non-luminous bodies: Those bodies which cannot produce light, are called non-luminous bodies, e.g., book, chair, moon, etc. Non-luminous bodies when comes in contact of luminous bodies, becomes visible due to radiations incident on them. "On the basis of medium of propagation of light bodies are classified as follows:" (i) Opaque bodies: Those bodies which do not allow light to pass through them are called opaque bodies, e.g., wall, wood, book,...

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