Self-study
Although there are immediate short-term gains in crop yield from a single application of certain hydrocarbon-based pesticides to fields on which they have not been previously used, studies have shown clearly that long-term use gradually depresses crop yield from this initially elevated level. ██ ██████ ████████ ████ ███ ██ █████ ██████████ ████████
Summary
Using certain hydrocarbon-based pesticides on a field not previously treated with pesticides results in immediate short-term increases in crop yield. However, long-term use results in a decrease in crop yield over time.
Strongly Supported Conclusions
Use of these pesticides results in benefits that decrease over time.
Analysis by AlexandraNash
3.
Which one of the following █████ ████ █████████ ████████ ███ ████████ ██████
a
is uneconomic
b
damages the environment
c
will eventually make ████ ████████ ████████████
d
is probably not █████████ ██ ██████████ ████ ██████████████ ████████████
e
gives financial returns ████ ████████ ████ ████