The phrase "net effect" refers to the overall result or impact of something once all the positive and negative factors are considered. It is the outcome that remains after all the additions and subtractions are made. Full definition
Overall, the connections between nitrogen, phosphorus, and climate are not just about net effects on rising temperatures or changing precipitation patterns. (issues.org)
I will be running a free promo next week to see what net effect, if any, it has on sales. (russellblake.com)
The overall net effect can be a lower net asset value. (investopedia.com)