Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain
the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in
Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles
and JavaScript.
A year after the Rio summit, there are growing reasons to suspect that the generalization of environmental causes may place excessive burdens on very poor countries.
It is natural that research should be competitive, but there is now ample evidence that competition is too fierce for many people's peace of mind and for the health of the scientific enterprise as a whole.
New products in the field of spectroscopy include a fluorescence spectrophotometer for routine assays, ultraviolet/visible range systems, and ultra micro cells for 0.5 μl volume.
