The pair have carried out a study of figures from the Office for National Statistics (ONS) which they say shows death rates and health problems are far more prevalent downwind of incinerators.
“I was appalled when I found the correlation,” Mr Ryan said. “That’s why I tried to get the truth out, but it’s such a big truth no one wants to know.
“What we have found is that ONS data at electoral ward level consistently shows worse outcomes in areas downwind of incinerators in terms of infant mortality, low birth rates, premature deaths and heart disease, among other things.”
The pair say small particles known as PM1s and PM2.5s, which are not monitored by the Health Protection Agency and Environment Agency (EA), are responsible for the health problems because they are inhaled.
Mr Ryan said: “How anyone can know incinerators are working properly is by checking the emissions coming out of them and checking the health of the communities exposed to them. They are doing neither really.”
Dr Steenis, who helped defeat plans for an incinerator in Capel in 2009, said the problem is worsened by the inferior technology used in the UK.
Plants in the USA and Scandinavia burn at 1,000C (1,832F) and above, whereas those in the UK like the one proposed for Cobham burn at 850C (1,562F).
Dr Steenis added: “By running gasification plants at too low temperatures, the particles don’t get broken down and far too much gets out.”
And Dr Steenis has calculated the 80ft chimney at the planned plant will mean emissions will effect a six-mile area downwind of the plant, with Cobham and Esher worst effected.
Western Daily Press: Chemical danger testing
Working with the NHS, the HPA will investigate suspicious clusters of disease which could be linked to chemical exposure.
The pledge was made as the fledgling agency, which began work in April, launched its five-year plan setting out its aims and objectives across a raft of health protection concerns.
The plan pointed out that an estimated 600 new chemicals entered the marketplace each month, on top of the 11million already known and 70,000 in regular use.
Various studies have claimed that exposure to chemicals can have serious effects on health , including the risk of birth defects and certain chronic diseases.
The HPA plan not only highlighted public concern about chemical-related accidents, but also the possible ill health consequences of long-term exposure to chemicals, such as those emitted from landfills, incinerators and industrial sites.