According to the United Nations Framework Convention on Climate Change, climate change means a change of climate which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods.
The increasing levels of Greenhouse Gases in the atmosphere such as Carbon Dioxide, Methane and Nitrous Oxide, make for a warmer world leading to abrupt changes in climate.
The manifestations of climate change in the form of increasing temperature, changes of precipitation, frequency and intensity of typhoons, sea level rise, and the risks of more droughts, floods, heat waves, and forest and grassland fires have impacts on the economy, environment and communities.
The Philippines is one of the most vulnerable countries to climate and disaster risks due to its geography, geographic location and poverty situation. An international report ranked the Philippines as the third most vulnerable country to extreme events in 2013 - the year when Typhoon Haiyan (Yolanda) devastated the Visayan region. A World Bank study also emphasized how sea level rise threatens coastal communities. Droughts, on the other hand, have been seriously affecting health and agricultural productivity.