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Why are there so few lapwings left in the UK?

Do second flushes of spring blooms signal changing seasons?

Which plants absorb carbon dioxide from the atmosphere most effectively?

Could large numbers of wind turbines affect our climate?

Has breeding docile honey bees weakened them?

How do ground-nesting birds avoid detection by predators?

What challenges face market towns in the modern world?

Will it ever be viable to grow seaweed to make into petrol?

With Richard Daniel. Is it viable to grow coppiced woodland along Britain's roads?

With Richard Daniel. Is pollution from leisure craft damaging the environment?

Are pesticides linked to the collapse in honey bee numbers?

Are comets boiled away to nothing by the heat of the Sun?

How does the sea-going albatross survive Antarctic storms?

Would many small nuclear power plants be better than one large one?

Can we reduce food scarcity by reducing food waste?

Many birds must die each year, so why are their corpses so rare?

What was the cause of the green ring seen around the Moon?

Why does it appear to be colder just as dawn breaks?

Changing coastlines and humane mole eradication.

Are marine creatures under threat from noisy wind turbines?

Will the cold winter halt the spread of bluetongue disease?

What produced the mysterious ice spike in a frozen beaker?

Can crops replace rainforest? And life in the ocean depths.

Radioactivity and evolution, and a novel memorial in space.

Late developing toads and why lions don't get scurvy.

Methane emissions and the value of recycling.

Supervolcanoes, waxwings and leaky central heating.

Hovering blackbirds, fertile volcanoes and Christmas trees.

Swimming mammals and an epic tussle - dragonfly v hornet.

Travelling Scots pine trees and Northern biased maps.