CLimate is the average weather condition over a long period of time.
Seasons are caused by the tilt of Earth's axis. It effects where and when the suns heat hits certain parts of Earth. So when its Fall for us it's Winter for places in the southern hemisphere like South Africa and New Zealand.
Wind is movements in the air. There are places with no air called doldrums. Local winds travel short distances and global winds travel long distances.
Land heats up (heat source)
Warm air rises
Rising helps form clouds.
Sinking air spreads along surface
Cooler air sinks
Ocean is cooler than land
Pollutants are things that damage the Earth's atmosphere. An example of a pollutant is a factory. Factories like these put fossil fuels in the air that end up hurting the enviroment.