WEBVTT

00:00:00.760 --> 00:00:04.510
Sunlight passes through the atmosphere and warms the Earth’s surface,

00:00:04.520 --> 00:00:07.350
the rest is reflected back into space.

00:00:07.360 --> 00:00:10.950
Some of the heat is trapped by greenhouse gases in the atmosphere

00:00:10.960 --> 00:00:15.670
which keeps the Earth warm and stops all the heat radiating into space from Earth.

00:00:15.680 --> 00:00:19.670
However as the percentage of greenhouse gases in the atmosphere increases,

00:00:19.680 --> 00:00:23.510
this is strengthening the greenhouse effect and warming up the atmosphere.

00:00:23.520 --> 00:00:27.030
As the amount of greenhouse gases in the atmosphere increases,

00:00:27.040 --> 00:00:31.590
the natural balance of the atmosphere is changing and the planet is becoming warmer.

00:00:31.600 --> 00:00:37.310
Carbon dioxide is the primary greenhouse gas which is emitted through human activities.