Three gas poisoning accidents happened early and late. In order to prevent from analogous accident, corresponding preventive measures were put forward, after the whys of these accidents were analyzed.

针对所发生的三起瓦斯中毒事故，为避免类似事故的重复发生，通过分析事故的原因，提出相应的防范措施。

youdao

Three of the deaths were due to carbon dioxide poisoning from gas-power generators.

三人死于燃气发电机的二氧化碳中毒。

youdao

In the first investigation, she was died from poisoning by gas.

第一次调查中，她是死于煤气中毒。

youdao

Devon and Cornwall Police said the source of the poisoning was "believed to be from incorrect operation of the gas cooker".

BBC: Carbon monoxide deaths: Inquests open

Flowing hazardous chemicals(fracking fluid) poisoning land throughout how many miles of ground and surface water from the Gas Well Site?

FORBES: Don't sign the wrong fracking petition

Joyce Bridgewater, from Camelford in Cornwall, suffered low-level CO poisoning by breathing the colourless odourless gas in her home over a period of 10 years and now has to use a wheelchair.

BBC: Warning over rise in carbon monoxide fatalities