I can speak about groundwater as it relates to climate change; I can't speak to the methane problem because it's not really an issue of climate change. I assume you're speaking about coal-bed methane and contamination of groundwater.
Groundwater is a solution in terms of water supply, because presently a relatively small proportion of the water supply in the Canadian prairies is derived from groundwater. As surface water supplies become less available, groundwater represents an opportunity to supplement the water supply. However, there are some serious limitations in our knowledge of the availability of groundwater and its quality.
There's also the opportunity to store water underground. The climate change scenarios indicate that we can expect drought of greater severity and length on the Canadian prairies, but we can also expect some unusually wet years as the climate becomes more variable. As the range of climate extremes increases, there will be some unusually wet years and some unusually wet winters. There's an opportunity to store that excess water under the ground and make it available during the drier years.