The first article “Suppressed demand in the clean development mechanism: conceptual and practical issues” studies the challenges of the application of greenhouse gas emission accounting in poor communities. “Proposal for improved nuclear fuel utilisation and economic performance by utilising thorium” summarizes the accumulated advantages of thorium-based fuels, which could form the initiative to implement thorium-based nuclear fuels in South Africa. “Energy supply in Malawi: Options and issues” reviews the current status of energy supply and demand in Malawi. “Bio-oil yield potential of some tropical woody biomass” is looking at biomass-based fuels as alternative or blend to fossil fuels thereby reducing the fossil fuel consumption gross index. “Using participatory GIS to examine social perception towards proposed wind energy landscapes” examines the landscape aesthetics and land use interference of proposed wind farms in the WCR of South Africa. “The optical design and performance of a concentrator photovoltaic module” investigates the design of two CPV modules (Module I and II), which are based on the Sandia III Baseline Fresnel module. “Energy improvement in induction furnace using foaming slag with variation of carbon injection” has as its aim to increase the efficiency of the Induction Furnace (IF) by using a foaming slag layer as insulation material to reduce the heat loss at the opening of the Induction Furnace. “Prediction of diesel engine performance, emissions and cylinder pressure obtained using Bioethanol-biodiesel diesel fuel blends through an artificial neural network” studies biodiesel and bioethanol obtained from safflower oil and diesel fuel blends used in an engine with a common rail fuel system. “Exhaust gas treatment for reducing cold start emissions of a motorcycle engine fuelled with gasoline-ethanol blends” focuses on the effect of EGI or the use of a catalytic converter on cold-start emissions of an air cooled motorcycle engine fuelled with gasoline ethanol blends. In “Building power control and comfort management using genetic programming and fuzzy logic” a power control model for comfort and energy saving, using a fuzzy controller and genetic programming (GP) is proposed. “Differential power algorithm based maximum power point tracking for a standalone solar PV system” reports on an improved maximum power point tracking (MPPT) system based on a differential power algorithm “Thermodynamic analysis of a direct expansion solar assisted heat pump water heater” theoretically investigates the thermodynamic performance of a direct expansion solar assisted heat pump (DXSAHP), which is used to heat domestic water from 20˚C to 45˚C. “Coherence and time-frequency analysis of impulse voltage and current measurements” points out the advantages of the use of the time-frequency analysis in the digital processing of waveforms recorded in high voltage impulse tests. In “The determination of short circuits and grounding faults in electric power systems using time-frequency analysis” the Keban power transmission line located in the Eastern Anatolia region of Turkey was modelled and probable short circuit scenarios were applied on the model.