CLEAN : WMO chief says human activities main cause

The video discusses the ongoing impact of climate change, highlighting that 2013 was the 6th warmest year on record. It emphasizes that global warming is primarily due to human activities, particularly the emission of greenhouse gases like CO2, methane, and nitrous oxide, which have reached record levels. The video stresses the importance of taking immediate action to reduce emissions to avoid surpassing the 2-degree global temperature increase target. It also outlines the multifaceted impacts of climate change, including extreme weather events, sea level rise, and effects on food security and health.

What does the text suggest about the variability of climate data?

Why is it important to look at longer periods when studying climate change?