it also reviews how greenhouse gas emissions and removals from the agriculture sectors contribute to climate change the implication is that the agriculture sectors need to both adapt to climate change by building resilience and contribute to climate change mitigation as well as providing a better understanding of potential changes in precipitation the report uses improvements in modelling and data collection to make better mediumterm projections accordingly the cascading impacts of climate change can now be attributed along chains of evidence from physical climate through to intermediate systems and then to people kirtman et al several studies document the biophysical impacts of the expected changes specifically on agroecosystems box the impacts range from yield reductions and increased yield variability to displacement of crops and the loss of agrobiodiversity and ecosystem services