Tony Fisher, Echo 24 November, is correct to point out that integrating an increasing percentage of renewable electricity into the National Grid will become more challenging.

Now solar PV and wind supply around 40%.

This figure is projected to increase and will require nuclear electricity to supply some of the base load.

Other sources for base load electricity are existing pumped storage hydro and new sources such as tidal and wave power. Batteries for electric vehicles can be charged overnight, when demand is low, to provide another way of storing electricity, until it is needed.

He is also correct to say that wind and solar power is still subsidised, but with the rapid fall on their costs, these subsidies are decreasing.

By contrast, governments still heavily subsidise fossil fuel companies, particularly oil and gas in the UK.

I expect renewable energy subsidies to continue to decrease, but not to reach zero for some time. If we are to successfully replace fossil fuels, then subsidies are an effective way for governments to encourage this transition.

The alternative of catastrophic extreme weather, due to rapid climate change is too awful to contemplate. This last year has shown the climate crisis we will face if we do not rapidily consign all our fossil fuels to history and keep them in the ground.

John Tomblin

Littlemoor Road, Weymouth