Alphonse and Justyn joined a group of environmental activists who marched in front of the Canadian Parliament buildings and then in front of the Alberta Legislature to protest the further development of the "oil sands" in Alberta.According to the text,why is extracting oil from bituminous sands,or "oil sands," a contentious process?

Question

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Extracting oil from bituminous sands, or "oil sands," is a contentious process because it produces more greenhouse gas than conventional oil extraction processes. This contributes to the issue of climate change, which is a major concern for environmental activists.

Alphonse and Justyn Joined a Group of Environmental Activists Who