The environment seriously needs improving. I have to walk to work and the shops and I literally walk past thousands of cars and lorries and it smells. I don't smoke but I have on occasions coughed up tar! My window sill gets covered in a layer of black soot-like substance month in month out.

Inam Haq, Bradford, UK

Butterflies are good indicator species because they react quickly to pressures such as climate change, pollution and habitat fragmentation. If there are fewer Butterflies then many other species will also suffer declines in due course. Improving habitats for Butterflies is good for all biodiversity.

James Webb, Reading, England

It will be very sad to see butterflies disappear and I sincerely hope they dont. I recall as a child loving looking at all the different types in our garden in Surrey, now it is rare to see them.

Alexander, Guildford, Surrey

Well, I can personally say that I have seen only one butterfly this summer. One idea would be to encourage the general public to create environments in their gardens - it would give everyone something creative and useful to do.

Abdul Majeed, Bradford, West Yorkshire, UK

Everything must be done to ensure the survival of all species. The land owners every where must donate part of of their land holdings to create new habitat . We should consider ourselves as caretakers of the planet . Every body reading this article must email their MP demanding his action.

Jim Wills, Brisbane, Australia