â What/How do you mean?â = â Meaning? â [=what exactly do you mean when you say that?] âHe can be a little difficult.â â I know what you mean.â [=I agree]
It has an atmospheric life of 3,200 years and global warming potential 23,900 times stronger than carbon dioxide. SF6 is considered one of the most dangerous greenhouse gases known. It is banned as a tracer gas and is limited to high voltage applications. In addition, the US Department of Energy repaired leaks in several laboratories, thereby reducing emissions by 35,000 pounds a year.
Giant hogweed (Heracleum mantegazzianum) has the worst reputation for it, but âfriendlyâ plants such as carrots, celery and limes can all blister the skin in the wrong conditions. One of the worst untouchable species, whatever the weather, earns the dubious honour of being the worldâs most dangerous tree.Thereâs a difference between poisonous and harmful. You can say whatâs the most poisonous plant fairly easily â theoretically looking at the toxins in it and what they can do,â says John Robertson.