Hydraulic fracturing is a technique to extract gas from rock. But people living close to fracking sites are concerned about the impact of toxic chemicals used in the process.
Technically water is mixed with sand and chemicals, and the mixture is injected at high pressure into the ground to create small fractures in the rock and let out the gas. This page collates recent DW content on the topic.
Republican presidential candidate Donald Trump has said - if elected - he'd work to undo the landmark Paris climate pact. Trump says his "America first" energy plan would push unfettered domestic fossil fuel production.