We need a clearer understanding of disease patterns and ecosystem impacts before embarking on eradication strategies, says Ummer Rashid Zargar.

Encouraging the spread of probiotic foods that promote healthy gut bacteria could help developing countries tackle obesity, says Kingsley Anukam.

The developing world needs 'big projects, not small ideas' — and nuclear power is a viable and necessary solution, argues Marje Hecht.

Monther Abu Remaileh says there will be rapid progress when the Arab world owns its decisions on development.

Developing countries need global reform as well as focused aid to beat poverty, argues Paul Collins of War on Want.

Warea Orapa says that tilapia fish — hailed as a method of controlling mosquitoes — can cause damage when introduced into new ecosysems.

There is little resistance to the pesticide pyrethrum at present, but use in bednets could change this, says Christiaan Kooyman.

The recent Hib vaccine study makes flawed and expensive recommendations for resource-poor countries, writes Jacob M. Puliyel.

Alexander Boksenberg argues that the unique potential of UNESCO's science strategies is substantial.

Gerry Wolff says evidence shows that the Middle East and North Africa's potential for generating solar power makes nuclear energy unnecessary.

Cristobal Valencia Ramirez describes Venezuela's take on innovation and enterprise, pointing out that its policies have been in place for at least five years.

Sam Lanfranco argues that the fame of the One Laptop Per Child initiative has prevented more worthy initiatives from receiving the media attention they deserve.

Wagdy Sawahel argues that it is not Islam, but Muslim leaders and policymakers who are to blame for the lack of scientific progress in the Islamic world.