Fracking will now be allowed in the UK's national parks in "exceptional circumstances", renewing the debate surrounding the drilling technique. The government launched a new round of bidding for drilling licences Monday after announcing guidelines that expands the area where fracking could occur. 

Fracking, which involves blasting water, chemicals and sand into shale rock to extract gas and oil, has proven to be very controversial throughout the UK. Government officials argue the practice is safe and will bring about more jobs and economic growth, but environmental activists say the technique harms the water supply and can cause earth tremors.

Many expressed opposition to the government's expansion of fracking areas: