The objectives of the study

4. Conclusions
AcknowledgementsWe sincerely express our deepest gratitude to the Fundamental Research Grant Scheme (Vote No: R.J130000.7809.4F348) that had financially supported this research, and MyBrain15 for awarding the corresponding author a scholarship under the MyPhD programme.
Dairy breeds; Hay; Forbs; Cheese; Carbon footprint (CF); Life cycle assessment (LCA)
1. Introduction
Knowledge of the environmental impact of livestock production and of the food chain as a whole can enable Dorsomorphin to adjust their diet and the food sector to change the production in order to reduce the consumption of resources.
It is well known that for food products of animal origin, primary production is responsible for most of the greenhouse gas (GHG) emissions (Fantin et al., 2012), which within dairy farming consists primarily of methane (CH4) from digestion, which – in turn – is positively related to the proportion of roughage in the diet (Kristensen et al., 2011). If using a perennial crop such as grass instead of maize, the high methane emission might be counteracted by the potential of grass to increase soil carbon sequestration (Vleeshouwers and Verhagen, 2002). Also the composition and utilisation of the grassland has been shown to have an impact on mitigation of GHG emissions, where it might be possible to reduce enteric methane emission by increasing the proportion of herbs in the feed (Patra, 2012).