The problem is sometimes the information is wrong, but perhaps more common is a severe lack of balance.
The fact that the gentle overall warming of the last 150 years or so is generally very beneficial is not acknowledged, whatever combination of factors has caused it. Nor is the positive impact of higher ambient CO2 levels on agricultural productivity often recognised.
When your goal is to scare people to get their attention, I guess you don't want to dilute your messaging. But we who don't care for their tactics nor their cause, need to be ready to respond to them, or at least help reduce the harm they must cause.
A new report from the GWPF provides parents and teachers with help to do that by providing an excellent background briefing on the benefits of CO2.
From their press release:
'... former IPCC delegate Dr Indur Goklany calls for a reassessment of carbon dioxide, which he says has many benefits for the natural world and for humankind.
Dr Goklany said: “Carbon dioxide fertilises plants, and emissions from fossil fuels have already had a hugely beneficial effect on crops, increasing yields by at least 10-15%. This has not only been good for humankind but for the natural world too, because an acre of land that is not used for crops is an acre of land that is left for nature”.'
For those who may want to keep up to date on this topic, or to find out more from the scientific literature about it, this site is invaluable: CO2 Science.
Note added 15 Oct 2015. The reformed ex-Greenpeace leader, Patrick Moore gave the GWPF Annual Lecture last night arguing we should 'celebrate CO2'. Details via this link: http://www.bishop-hill.net/blog/2015/10/15/should-we-celebrate-co2-cartoon-notes-by-josh.html