The earth’s climate is changing and experts warn that global warming is happening ten times faster than it did at any time. Human activities are the main cause for the rise in temperature. The effects of climate change are evident around us: more frequent and severe weather-related natural disasters, rising sea levels, melting of polar ice caps and glaciers, and the possible extinction of entire animal and plant species.
CLIMATE CHANGE: WHY IS THE CLIMATE GETTING WARMER?
THE GREENHOUSE EFFECT
Some of the infrared radiation passing through the atmosphere is absorbed and re-emitted in all directions by greenhouse gas molecules. This raises the temperature of the lower atmosphere and the earth’s surface, leading to climate change.