Sixth-extinction estimates are “biased towards a very small portion of biodiversity”. When it comes to invertebrates – the slugs, crabs, worms, snails, spiders, octopuses and, above all, insects that make up the bulk of the world’s animal species – we are guessing.

Dr James Hansen is rightly admired for his scientific and political work drawing attention to climate change. His advocacy of nuclear power ‒ and in particular novel Generation IV nuclear concepts ‒ deserves serious scrutiny.

In a nutshell, Dr Hansen (among others) claims that some Generation IV reactors are a triple threat: they can convert weapons-usable (fissile) material and long-lived nuclear waste into low-carbon electricity. Let's take the weapons and waste issues in turn.

The EPA was only four years old when glyphosate entered the market in 1974, and the agency was faced with a large collection of chemicals to review. At the time, protocols for toxicology testing were relatively fluid, and it took the EPA until 1986 to finalize its guidelines. Yet the EPA’s analysis of glyphosate still relies heavily on the initial data.

Imagine you’re driving your shiny new car too fast along a wet, curvy road. You turn a corner and realize you’re heading straight for a crowd of pedestrians. If you slam on your brakes, you’d probably skid and damage your car. So you keep your foot on the accelerator, heading straight for the crowd, knowing they’ll be killed and maimed, but if you keep driving fast enough no-one will be able to catch you and you might just get away scot-free.

The number of people suffering from malnutrition worldwide rose to 815 million in 2016, rising by 38 million from the year before. According to a new report co-signed by five United Nations agencies and charities, and made public by the Food and Agriculture Organisation of the UN (FAOUN) on Friday, this was the first such year-to-year increase since the beginning of the 21st century.

The development of science and technology, and their spread around the world in the form of gigantic increases in food production, have made possible a century-long reduction in the number suffering from hunger and malnutrition. In 2016, the world produced more than enough food to provide an adequate and nutritious diet to every human being on the planet.

The prevailing liberal approach to ecological problems, including climate change, has long put capital accumulation before people and the planet. It is maintained that through new technologies, demographic shifts (such as population control), and the mechanisms of the global “free market,” the existing system can successfully address the immense ecological challenges before us. In short, the solution to the ecological crises produced by capitalist accumulation is still more capitalist accumulation.  In these dire circumstances, it is dispiriting but not altogether surprising that some self-styled socialists have jumped on the ecomodernist bandwagon, arguing against most ecologists and ecosocialists that what is required to address climate change and environmental problems as a whole is simply technological change, coupled with progressive redistribution of resources.

The term Green Revolution refers to the introduction of high-yielding varieties of staple food crops, particularly wheat and rice, into Third World countries, starting in the 1960s. Initially Mexico, India and the Philippines were targeted. The stated aim was to increase food production to end hunger and prevent uprisings.

The Green Revolution did increase agricultural production, and no more successful revolutionary uprisings occurred, but it failed to reduce hunger and poverty, improve nutrition, or protect the environment. While some of these failures are now acknowledged by the proponents, the answer is that “there was no alternative”, and that for untouched areas of the world, particularly Africa, there is still no alternative. However, that alternative does exist: it is called agroecology. Science takes credit for successes but takes no responsibility for failures (Shiva 2001).