Livestock Science 

TL;DR: Differences in environmental impact among pork, chicken, and beef can be explained mainly by 3 factors: differences in feed efficiency, differences in enteric CH4 emission between monogastric animals and ruminants, and differences in reproduction rates.

TL;DR: In this paper, the effects of climate change on livestock following the theory of global warming are discussed and a relevant increase of drought is expected across the world affecting forage and crop production, which will reduce the carrying capacity of rangelands and buffering ability of agropastoral and pastoral systems.

TL;DR: In this article, a number of options are reviewed to reduce production of enteric CH 4 and N 2 O from ruminant production systems, mainly focusing on breeding, feeding, animal management, soil and fertilizer management, and rumen manipulation.

TL;DR: In this article, sustainable intensification of smallholder livestock systems must take into account both social and environmental welfare and be targeted to sectors and areas of most probable positive social welfare returns and where natural resource conditions allow for intensification.

TL;DR: Examining Ca interactions with dietary phytate and phytase, particularly exogenous, microbial phytases, and their consequences for poultry and pigs finds that high dietary Ca levels may disrupt protein–phytate complex formation by interacting with both protein and protein even at acidic pH levels, thereby influencing the outcomes ofphytase amino acid digestibility assays.