According to some scientists, global warming the survival of the whole human race.

It is generally believed that climate change is caused by human activities .

Which of the following is NOT the reason for the greenhouse effect A: Uncontrolled development. B: A warming atmosphere at a global level. C: Sunlight reaches the forest floor, dries plants and lights fires. D: No limits on logging and bad fire preventing efforts.

Global Warming Global warming A mix of ______________ and irregular climate change Cause of global warming ________________: carbon dioxide, water vapor, and methane ________________: using forests as fuel, for building, furniture, etc. The use of __________________ on crops _____________________ Effects of global warming Destruction of important _______________________ systems Loss and endangement of many ___________________________ _______________________________________ Solutions to global warming To reduce gases put into atmosphere Be more _______________, use wind and solar power etc. To in crease greenhouse gases taken out of the atmosphere Planting trees Making changes to the _____________________________

Most of the global warming observed over the past 50 years is attributable to human activities. ( )