If you live in the European Union, please consider signing this European Citizens' Initiative* to get the herbicide glyphosate banned from being used in EU countries. (I've just signed it.) One of the many worrying things about glyphosate is that it's used by farmers to "dessicate" various crops shortly before harvesting, which means that glyphosate residues end up in some of our food products—bread in particular. (See "Glyphosate Residues in UK Food 2011", gmfreeze.org, (October 2012) [external PDF].)
A main reason why that's worrying is that in 2015 the International Agency for Research on Cancer (IARC) of the World Health Organization (WHO) declared glyphosate as "probably carcinogenic to humans". (See IARC Monographs on the evaluation of carcinogenic risks to humans : Glyphosate [external PDF], International Agency for Research on Cancer, World Health Organisation (updated 11 August 2016), and particularly paragraph 6.3 for the overall evaluation, "Glyphosate is probably carcinogenic to humans (Group 2A)".)
European Citizens' Initiative: Ban glyphosate and protect people and the environment from toxic pesticides
"We call on the European Commission to propose to member states a ban on glyphosate, to reform the pesticide approval procedure, and to set EU-wide mandatory reduction targets for pesticide use.
Ban glyphosate-based herbicides, exposure to which has been linked to cancer in humans, and has led to ecosystems degradation; ensure that the scientific evaluation of pesticides for EU regulatory approval is based only on published studies, which are commissioned by competent public authorities instead of the pesticide industry; set EU-wide mandatory reduction targets for pesticide use, with a view to achieving a pesticide-free future."
(* The European Citizens' Initiative is an interesting creature in that its very existence testifies to the undemocratic nature of the EU. If you have to institute a method like this to allow citizens' voices to be recognised by the European Commission, there must be something seriously wrong with the system. Still, it's here, so let's help get the 1,000,000 signatures, so that the Commissioners will be obliged to lend a condescending ear to the hoi poloi for a moment.)