How to build an above ground greenhouse impervious to winds above 300 to 500 miles per hour

 Basically it would likely need to be built with metal and cement because most things made of wood will be blown away by 300 to 500 mph winds. However, plexiglas or bulletproof glass could be used that has proved it can withstand winds this strong.

So, basically what you could do is to build something to stand anything long term and then just put temporarily 4 to 8 ml greenhouse plastic on it temporarily as a greenhouse. Then as winds grow in force slowly or quickly this century put in stronger and stronger plastic or plexiglas or bulletproof glass so you always are prepared for the next level of destruction that the winds will bring. This way you are preparing now for the future winds later this century now.

For example, if you are already getting 80 to 100 mil per hour winds like we do in southern California during the Santa Ana winds, these winds might reach 100 to 150 mph by 2050 for example.

Also, if you live in tornado alley then you have to expect that the highest winds inside a tornado to increase over time too as the heat increases as a matter of course.

The same will be true of the winds inside hurricanes where hurricane winds have already been clocked above 300 mph some places on earth.

Also, I'm thinking that a cheap way to desalinate water is going to be needed for farming around the world nearer to oceans everywhere because the droughts and flooding might prevent expecting rain to be enough "Anywhere" on earth soon the way things are presently going with Global Climate changes.

Too much rain or no rain at all to grow crops appears to be the "Coming Norm" for most life on earth at this point.

So, a way to cheaply desalinate water must be found to continue to grow food nearer to the oceans here on earth so the human race can continue to survive all these changes.