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Product Description Climate change has become the worlds greatest and complex challenge. If necessary and timely action is not taken, the average temperature of the earths surface is expected to increase by 1.8 to 4 degrees by the year 2100. The activities over the last century and a half of industrialization have increased the content of carbon dioxide, methane and nitrous oxidethe so-called greenhouse gasesin the atmosphere. This is altering the climate in a manner that could lead to extinction of numerous plant and animal species. The average sea level rise is expected to be 18 to 59 cm by the year 2100. It could overflow the heavily populated coastlines of countries like India and Bangladesh, cause the disappearance of some nations entirely such as the island state of the Maldives, foul freshwater supplies for billions of people, and spur mass migrations. The intensity of Indian summer monsoon may increase. There will be changes in frequency and/or magnitude of extreme temperature and precipitation events bringing mounting difficulties and threatening human beings. Climate change will also impact the huge coastline and Himalayan glaciers. In addition, climate change will result in a drop in agricultural yields, and expansion of a range of diseases such as malaria. In a world that is crowded and under stress, millions of people depend on weather patterns such as monsoon rains, to continue as they have in the past. Hence, even minimum changes could become difficult and disruptive. The enhanced greenhouse effect is altering the complex web of systems that allow life to thrive on earth such as cloud cover, rainfall, wind patterns, ocean currents, duration of the seasons and the distribution of plant and animal species, at an unprecedented speed. It is imperative for the world to act now, as what is done today would determine both the climate of tomorrow and the choices that would shape the future of the people. The world has to act together