Biofuels derived from microalgae have the potential to replace petroleum fuel and first-generation biofuel, but the efficacy with which sustainability goals can be achieved is dependent on the lifecycle impacts of the microalgae-to-biofuel process. This study proposes a detailed, industrial-scale engineering model for the species Nannochloropsis using a photobioreactor architecture. This proces...

Agriculture is one of the largest anthropogenic sources of greenhouse gases (GHGs), with dairy and beef production accounting for nearly two-thirds of emissions. Several recent papers suggest that dung beetles may affect fluxes of GHGs from cattle farming. Here, we put these previous findings into context. Using Finland as an example, we assessed GHG emissions at three scales: the dung pat, pas...

Rivers and streams are recognized as potential greenhouse gas (GHGs: CO2, CH4, N2O) sources, contributing to global warming. However, GHG emissions from rivers have received insufficient attention compared other ecosystems (forests, grasslands, wetlands, etc.). In this study, dissolved concentrations were measured in the Qingyijiang River, longest tributary lower reaches of Yangtze during two c...

Globally, the transport sector is responsible for emission of 30% all anthropogenic greenhouse gases (GHGs) which are main reason behind change in climate and accelerated warming globe. This research estimated GHGs from vehicles Bayero University, Kano also established pattern vehicular GHG emissions on campus taking into consideration peculiarities systems Nigerian university campuses. Data st...

In this paper, a bi-objective multi-product single-vendor single-buyer supply chain problem is studied under green vendor-managed inventory (VMI) policy based on the economic production quantity (EPQ) model. To bring the model closer to real-world supply chain, four constraints of model including backordering cost, number of orders, production budget and warehouse space are considered stochasti...

the objectives of this study was to estimation of greenhouse gases (ghg) emissions and global warming in rice production and identify measures to reducing fossil energy use and greenhouse gases emissions. three rice production systems included sri, improved and conventional were studied. all activities, field operation and data in production methods and differents inputs rates were monitored an...

The Regional Greenhouse Gas Initiative (RGGI) is a multi-state plan to reduce greenhouse gas emissions from electric power plants in a 10 state region in the northeastern US that extends from Maine to Maryland. The compliance period for the Initiative started January 1, 2009 and was preceded by two auctions of CO2 emission allowances. RGGI is the first mandatory market based program in the US t...

The East Asian summer monsoon (EASM) experienced decadal transitions over the past few decades, and the associated "wetter-South-drier-North" shifts in rainfall patterns in China significantly affected the social and economic development in China. Two viewpoints stand out to explain these decadal shifts, regarding the shifts either a result of internal variability of climate system or that of e...