[quote="Carcass"]The wind farms nationwide now produce a total of almost 100 terawatt-hours of electricity a year, almost 2.5 percent of total demand, but that is still (i) ___compared with the 45 percent generated by coal-fired plants. There are a host of scientific issues to overcome before wind can (ii) ___ fossil fuels, but one of them is surprisingly (iii) ___: We still do not completely understand the fundamental way winds blow.
Blank (i) |
Blank (ii) |
Blank (iii) |
significant feat |
blow away |
thorny |
small potatoes |
be eclipsed by |
basic |
promising |
seriously challenge |
notorious |
The first blank should be easy to start with, 2.5% is "small potatoes" compared to 45%. Wind energy is very less compared to fossil fuels because of "host of scientific issues", these issues need to be fixed(Overcome) in order to "seriously challenge". For third blank, one of the issues is surprisingly________, if you still do not understand the fundamental way, then it is surprisingly "Basic".