"The greenhouse is present for two centuries. Greenhouse gases are necessary because without it the earth would be too cold to hold liquid water but limited. From those years the greenhouse gases called Carbon dioxide effect has increased in concentration by about 50%. That is boosting to change climate “Climate Changes”. Climate change has profound impacts on the earth's resources and the environment in onshore as well as offshore. Here one of the earth's resources is Groundwater that is threading by climate change. In Myanmar, Groundwater in coastal areas and delta area closed to the sea are starts facing that effect. Of that sea level rising by ice, glaciers melting are causing the greatest sign of seawater intrusion to Groundwater at Ayeyarwaddy delta area in Myanmar, mostly in the lower part of widening delta area. And impacts of climate change on Groundwater are slower than others such as surface water but permanently worsen the groundwater by depletion and degradation. Climate changes are linking with sea level rising, saltwater intrusion, increasing temperature, precipitation and recharge to groundwater. These points are threatening to Groundwater in the long-term. According to the Global Climate Risk Index, Myanmar is the second most vulnerable in the world to the impacts of climate change from 1993 to 2014 (Kreft et al., 2014). 2 - Ayeyarwady Delta and Coastal Region The Ayeyarwady Delta fans out from the limit of tidal influence at Myan Aung to the Bay of Bengal and the Andaman Sea. The low land (Alluvial plain) of Delta is as low as just 3 meters above sea level. Length of the coastal of the lower seaward third of the delta is completely flat with no local relief and stretches for 130 kilometers from east to west. The sea is very shallow with depths less than 5.5 m across the coastline. Deforestation has changed the landscape. As a result of constant accretion into the sea, the delta is advancing year by year. One scientific study estimated that the Delta lost 1,685 km2 (651 mi2) from 1978 to 2011..."