Climate change is a change in statistical distribution of weather patterns that lasts for an extended period of time. It encompasses global warming but refers to broader range of changes that are happening to our planet.
Climate change is mainly due to the excessive use of fossil fuels, which releases carbon dioxide and other greenhouse gases into the air. The gases trap heat within the atmosphere, which can have a range of effects on ecosystem.
Evidence of rapid climate change includes sea level rise, global temperature rise, warming oceans, shrinking ice sheets, declining arctic sea ice, ocean acidification, shifts in plant blooming time, changes in precipitation etc.