With money now flowing in, the fight against malaria must shift from advocacy to getting results. (Editorial)

Rates of atmospheric deposition of biologically active nitrogen (N)are two to seven times the pre-industrial rates in many developed nations because of combustion of fossil fuels and agricultural fertilization. They are expected to increase similarly over the next 50 years in industrializing nations of Asia and South America. Although the environmental impacts of high rates of nitrogen addition have been well studied, this is not so for the lower, chronic rates that characterize much of the globe. Here we present

Although vaccination has almost eliminated measles in parts of the world, the disease remains a major killer in some high birth rate countries of the Sahel. On the basis of measles dynamics for industrialized countries, high birth rate regions should experience regular annual epidemics. Here, however, we show that measles epidemics in Niger are highly episodic, particularly in the capital Niamey. Models demonstrate that this variability arises from powerful seasonality in transmission

The US Department of Energy has pulled out of a flagship project to build the first 'clean' coal-fired power plant in the United States, a move that will kill the project unless supporters can rouse Congress on its behalf.

The Kyoto Protocol is a symbolically important expression of governments' concern about climate change. But as an instrument for achieving emissions reductions, it has failed1. It has produced no demonstrable reductions in emissions or even in anticipated emissions growth. And it pays no more than token attention to the needs of societies to adapt to existing climate change.

India has planted a million Jatropha curcas seedlings on unused land along its tracks and elsewhere. It

Zea mays has become the very emblem of plenty, with rich golden

Good policy decisions on science and the environment require sound contributions from official bodies, pressure groups, the media

How often does independent research change laws as well as minds? A lobby group in Delhi is forcing the Indian government into new regulations. Apoorva Mandavilli meets its leader.

Direct observations of sunspot numbers are available for the past four centuries, but longer time series are required, for example, for the identification of a possible solar influence on climate and for testing models of the solar dynamo. Here we report a reconstruction of the sunspot number covering the past 11,400 years, based on dendrochronologically dated radiocarbon concentrations. We combine physics-based models for each of the processes connecting the radiocarbon concentration with sunspot number.