Human-induced changes in long-term climatic averages and variability (including climatic extremes such as droughts, severe storms and floods) that are observed and projected for the future.Climate change is happening and it's happening now. It's not a distant phenomenon that will happen in some unknown future, and it's not only about hotter temperatures. In some parts of the world annual rainfall is expected to undergo long-term decreases; in other regions, fluctuations in rainfall and temperatures for a particular season of plant growth will have a serious impact. In yet other places, the amount of rainfall over the year may stay the same, but it may rain after bigger gaps in time, much harder and for shorter periods, which could mean both increased droughts and increased flooding. The intensity of severe storms such as hurricanes could increase. The potential impacts of climate change are far-flung and varied, and addressing it has become a top priority for today's global development agenda.

Climate change is a development issue. Because of its potential impact on so many aspects of human life, climate change is arguably the world's most important development issue today. The rich countries of the world, which industrialized a while ago, are predominantly responsible for causing the climate change problem, while the poorest communities and countries will be impacted the most, since they are typically the hardest hit by increased floods, droughts, storms, and other predicted changes, and don't have the means to cope adequately. In fact, many development gains could be lost because of climate change, leaving more people in poverty. For example, human-induced climate change is expected to:

Various steps can be taken to overcome this effects such as improvingeducation,awareness  and training on the impacts of climate change.Lowering carbon emission in individual level .Adaptation involves taking measures to prepare for the impacts of climate change. This includes improving education, awareness and training on the impacts of climate change, as well as taking tangible steps such as planting drought-resistant seeds and creating better coastal protection. People's ability to adapt is influenced by their income levels, health, access to secure shelter, supportive social networks, and local policies. Sound development policies should consider adaptation needs, and countries are increasingly heading in this direction. Climate change is already threatening the lives, health and livelihoods of hundreds of millions of people worldwide, who lack the financial, technical, human and institutional resources to adapt.