"To offset the reduction" means to counteract or balance a decrease or lowering of something. It implies taking actions to make up for the loss or decrease. Full definition
However, it will also cause the price of renewable energy certificates to rise to offset the reduction in the carbon price. (reneweconomy.com.au)
Much of this comes about from the significant reductions in tax rates (reduction of two - percentage points in the GST, a six - percentage point decline in the general corporate income tax rate, among others), without offsetting reductions to program expenses. (3dpolicy.ca)
In contrast, the higher saturated fat intake raised concentrations of larger, more cholesterol - enriched LDL particles, thus offsetting the reduction in total LDL concentrations that was observed with lower saturated fat intake (8)(Figure 1). (academic.oup.com)