The Biden administration has unveiled plans to expand offshore wind energy in a move that could see turbines built along much of the US coastline.

Seven areas on both coasts and the Gulf of Mexico will be auctioned for wind farms in the next few years, Interior Secretary Deb Haaland said on Tuesday.

It comes as President Joe Biden pushes to reduce US fossil fuel use and expand the green energy economy. Experts say dramatic action is needed to meet Mr Biden's climate goals.

The wind farms are part of Mr Biden's plan to generate 30 gigawatts (GW) of offshore wind energy - enough to power 10m homes - by 2030.

That goal falls short of the 40GW that the UK is planning. China is aiming to achieve around 73GW by the same date.

Guest post from BBC News