Global warming is caused by CFCs building up in the atmosphere and thinning the ozone layer, allowing more sunlight to pass through and melt polar ice caps. This causes sea levels to rise and increases natural disasters. Weather refers to short-term conditions in a specific area, while climate describes conditions over long periods of time. Global warming is linked to more tsunamis, cyclones, floods and droughts, and sea levels have already risen 59cm in the last 100 years and will continue to rise without reducing pollution.