Hydrogen, helium, and nuclear fusion
The answer is strongly dependent on WHAT trend you have in mind.
Above the ground pipelines save permafrost from destruction, but they can : D. cause habitat loss for arctic animals
This happen because above the ground pipelines destroy the environment and making it unsuitable to support the animal's living
hope this helps
Answer:
They are decreasing
Hope it might helps you
Please mark it as the brainlist answer please.