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AbstractImproving the long-term stability of perovskite solar cells is critical to the deployment of this technology. Despite the great emphasis laid on stability-related investigations, publications lack consistency in experimental procedures and parameters reported. It is therefore challenging to reproduce and compare results and thereby develop a deep understanding of degradation mechanisms. Here, we report a consensus between researchers in the field on procedures for testing perovskite solar cell stability, which are based on the International Summit on Organic Photovoltaic Stability (ISOS) protocols. We propose additional procedures to account for properties specific to PSCs such as ion redistribution under electric fields, reversible degradation and to distinguish ambient-induced degradation from other stress factors. These protocols are not intended as a replacement of the existing qualification standards, but rather they aim to unify the stability assessment and to understand failure modes. Finally, we identify key procedural information which we suggest reporting in publications to improve reproducibility and enable large data set analysis.

Abstract Floating photovoltaic systems (FPVs) are one of the emerging renewable-energy technologies suitable for implementation in land-scarce areas around the world. The installation of FPVs in water bodies in highly populated countries such as India will improve renewable-energy production with added advantages in terms of efficiency, water savings and reduced carbon emissions. In this context, the present study aims to identify suitable reservoirs for solar energy production using FPV technology in Tamil Nadu, India using geographic information system techniques. A total of 118 reservoirs located in the study area were considered. The results have shown that the implementation of FPV systems will significantly improve the production of renewable energy. The most suitable reservoirs with hydroelectric power plants for hybrid FPV implementation and their potential to reduce water evaporation and carbon emissions are presented. The results reveal that hybrid systems will generate 1542.53 GWh of power annually and also save 36.32 × 106 m3 of water every year. The results of this investigation will aid in fulfilling sustainable energy production in India, and the methodology presented may be useful for the analysis and prioritization of reservoirs for the implementation of FPV all over the world.

The economic value of adaptation to climate impact on renewable resources is examined using the UniSyD_IS model of Iceland's energy system. The model captures the entire energy system including interactions among supply sectors, energy markets, infrastructure and fuel demand. In this framework, climate adaptation options are evaluated in the context of a rational decision making process. Comparison of two scenarios with and without climate impact on hydro and biomass resources reflects the direct and indirect economic effects of adaptation strategies and provides insights for generation and energy supply investment planning. The simulation results show that the adaptation to climate change in Iceland leads to higher installed capacities for hydro, biodiesel, and bioethanol plants with lower supply costs. The findings indicate that the adaptation of energy supply to climate change could provide net benefits from an energy supply perspective.

In this study, we apply the inter-regional input–output model to explain the relationship between China’s inter-regional spillover of CO2 emissions and domestic supply chains for 2002 and 2007. Based on this model, we propose alternative indicators such as the trade in CO2 emissions, CO2 emissions in trade and the regional trade balances of CO2 emissions. Our results do not only reveal the nature and significance of inter-regional environmental spillover within China’s domestic regions but also demonstrate how CO2 emissions are created and distributed across regions via domestic and global production networks. Results show that a region’ sC O2 emissions depend on its intra-regional production technology, energy use efficiency, as well as its position and participation degree in domestic and global supply chains. & 2013 Elsevier Ltd. All rights reserved.

AbstractGlobal greenhouse gas (GHG) emissions can be traced to five economic sectors: energy, industry, buildings, transport and AFOLU (agriculture, forestry and other land uses). In this topical review, we synthesise the literature to explain recent trends in global and regional emissions in each of these sectors. To contextualise our review, we present estimates of GHG emissions trends by sector from 1990 to 2018, describing the major sources of emissions growth, stability and decline across ten global regions. Overall, the literature and data emphasise that progress towards reducing GHG emissions has been limited. The prominent global pattern is a continuation of underlying drivers with few signs of emerging limits to demand, nor of a deep shift towards the delivery of low and zero carbon services across sectors. We observe a moderate decarbonisation of energy systems in Europe and North America, driven by fuel switching and the increasing penetration of renewables. By contrast, in rapidly industrialising regions, fossil-based energy systems have continuously expanded, only very recently slowing down in their growth. Strong demand for materials, floor area, energy services and travel have driven emissions growth in the industry, buildings and transport sectors, particularly in Eastern Asia, Southern Asia and South-East Asia. An expansion of agriculture into carbon-dense tropical forest areas has driven recent increases in AFOLU emissions in Latin America, South-East Asia and Africa. Identifying, understanding, and tackling the most persistent and climate-damaging trends across sectors is a fundamental concern for research and policy as humanity treads deeper into the Anthropocene.