When and where was the first global convention to think of ways to protect enviornment held ?
Answer
Conferences were held first at Stockolm, the capital of Sweden in $1972$ ,and then at Rio de Janeiro of Brazil to think of ways to protect enviornment.
Carbon Dioxide, methane, nitrous oxide, chlorofluorocarbon $(CFC),$ halo carbon, etc. are known as greenhouse gases. These gases retain heat, Increase in their proportion leads to problems of global warming and climate changes.
Global Warming means unequal and continual rise in average temperature in Earth’s climate due to greenhouse effect. Certain gases tarp infrared rays so that the temperature of earth increases, The planet becomes warmer. This effect is known as “Global Warming”.