Fill in the blanks with appropriate word in each gap.

In recent years, there have been many alarming reports that the world's climate is undergoing a significant change. All these reports provide (a)-----evidence that world's temperatures are increasing day by day. This increase in global (b)----- is caused (c)----- increased amount of carbon-di-oxide (d) ----- the earth. Most climatologists (e)------ that green house effect is the likely cause of this global warming. It may harm human (f)------ seriously. This could catastrophically (g) ----- mankind's (h)----- to grow food.