The increase in atmospheric carbon dioxide (CO2) concentration has been linked to the proliferation of weeds, which can reduce the productivity and quality of crops and natural ecosystems. This is because many weed species have a higher photosynthetic capacity than crop and native plant species, which allows them to take advantage of the increased availability of CO2. However, weed-eating livestock could be a sustainable solution to control the proliferation of weeds and reduce their negative impacts.

Livestock, such as sheep and goats, are known to be effective weed eaters, as they can selectively target and consume many weed species that are resistant to herbicides or mechanical control. Moreover, livestock can also trample and disturb the soil, which can reduce the germination and growth of weed seeds. Therefore, integrating livestock grazing with crop and natural ecosystem management could provide a sustainable and cost-effective solution to control weeds.

However, it is essential to manage livestock grazing to ensure that it does not have negative impacts on soil health, vegetation, and wildlife. Overgrazing can lead to soil compaction, erosion, and reduced vegetation cover, which can affect soil fertility and biodiversity. Therefore, it is necessary to use appropriate grazing management techniques, such as rotational grazing, to ensure that livestock have access to sufficient and nutritious forage while avoiding overgrazing and damage to the vegetation.

Moreover, it is important to consider the social and economic aspects of livestock grazing, such as the potential conflicts with other land uses, the costs and benefits of livestock ownership and management, and the cultural and environmental values associated with livestock grazing.

Weed-eating livestock could be a sustainable and cost-effective solution to control the proliferation of weeds and reduce their negative impacts on crop and natural ecosystems. However, it is essential to manage livestock grazing to ensure its sustainability and avoid negative impacts on soil health, vegetation, and wildlife. Therefore, incorporating livestock grazing into integrated crop and ecosystem management could provide multiple benefits for both agriculture and the environment.