1. The Greenhouse Effect and Global Warming

2. A comparison…
A Greenhouse: the glass panels let the sunlight in but they also keep the heat from escaping
The Atmosphere
traps radiant energy from the sun
Instead of having glass panels like a greenhouse, we have greenhouse gases

3. The Greenhouse Effect 1 – Sunlight enters Earth’s atmosphere passing
through the greenhouse gases
2 – It reaches the surface and its energy is
absorbed
3 – Once it’s absorbed it’s sent back into the
atmosphere
4 – Some passes through to space while most of
it is trapped by the gases – this heats the Earth

4. Global Warming an average increase in the Earth's temperature
Earth has actually been warmed 1 degree in the last 100 years.
Some scientists believe that it’s people and their pollution that’s causing the increase in heat
A warmer Earth may lead to changes in rainfall patterns, a rise in sea level, and a wide range of impacts on plants, wildlife, and humans.