Rainwater harvesting (RWH) as an alternative means of providing water in domestic contexts, is viewed as an effective supply option worldwide. In Mexico City, the water situation is critical and the provision of water services to the population represents a formidable challenge for the city’s water utilities. The main objective of this study is to evaluate the potential for RWH to supply domestic properties in Tlalpan, 1 of 16 delegations in the city with one of the highest percentages of homes unconnected to the distribution network. Results show RWH can meet 88% of household water demand during the 6 month wet season, with an annual saving of 55%. Modelling a World Health Organisation minimum demand of 20 l/p/d as a means of resilience management in the event of a water crisis, 6-month and annual savings were 99% and 80% respectively. The minimum tank size to achieve wet season savings of 90% was 6m3 in two precipitation bands and tank sizes of 13,000 – 17,000L were sufficient in 3 out of 4 to prevent overspill. The report concludes RWH is a viable method of providing water in the south of the city and should be part of an integrated water management solution.

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The impact of human activity on our planet is undeniable. However, this matter of fact is not fully understandable without analyzing the narratives through which people make sense of it. In this study, we aim to describe the narratives present in environmental discourses of Mexican and French YouTubers' videos. This corpus is intended to show how environmental issues are framed in the ever-growing discursive arena of entertainment and “influencing” streaming video. We set out to perform a cross-country comparison, with the purpose of contributing to the discussion of whether environmental discourse is country-specific or shared by various nations and, possibly, even global. Our study contributes to the understanding of the social construction of the environment via these discourses. Our main result points to a paradoxical treatment of environmental issues: the YouTubers of our sample represent them as collectively induced problems, but seem to mainly believe that individual-based solutions would resolve them. More broadly, our study suggests a tendency to the individualization and, therefore, the depoliticization of environmental issues as well as a globalization of the environmental discourses in YouTubers' videos.

Strategies to achieve sustainable water management throughout the world are urgently needed as different regions are already experiencing high water stress with serious negative consequences on human health and ecosystems. Acknowledging the difference between efficiency and sustainability in water management, this paper considers the need of implementing actions that take into account future demand as well as the integrity of ecosystems. Consequently, recommendations are made regarding the investments that should be made on (1) access to clean water for human consumption, (2) ecosystem conservation and restoration, (3) watershed management, (4) collection and dissemination of data to the general public and decision makers, (5) finding ways to prevent and solve conflicts over water, and (6) encouraging community participation through local leadership, control over water resources, a fair allocation of benefits, and effective funding mechanisms.