The environmental theme was entirely his idea, and a natural fit for the character of Pike.

The information on board has a safety, health and environmental theme running through it.

Companies are increasingly turning to environmental themes to sell products.

The strip also lost the environmental themes Mills had placed in it.

Yet nearly 500 companies, most quite small, offer trips with an environmental theme, and new ones are cropping up each year.

His books often contain environmental themes, and events based on things that have happened to him.

He decided to make an album with an environmental theme, and consequently began work Tomorrow.

It is a film with a strong environmental theme.

She also writes children's books with cultural and environmental themes.

It is a foreign exchange program with an environmental theme.