Climate change may be one of the biggest threats facing the planet. The climate is changing and the earth is warming up. With global warming on the increase and species and their habitats on the decrease, chances for ecosystems to adapt naturally are very small. Natural events and human activities are believed to be contributing to an increase in average global temperatures. But primarily increased by greenhouse effect. If the greenhouse effect becomes stronger than what it already is, more heat will get trapped than needed and the earth might be less habitable for humans, plants and animals.
Human activity has caused an imbalance in the natural cycle of the green house effect. When we mine, coal and extract oil from the Earth's crust, and the burn of fossil fuels for transportation, heating, cooking, electricity and manufacturing, we are effectively moving carbon more rapidly into the atmosphere than it is being naturally removed. Also, by clearing forests to support agriculture, we are transferring carbon from living biomass into the atmosphere. Humans are adding ever-increasing amounts of extra carbon dioxide into the atmosphere.