After inspecting models from five major laptop manufacturers, those by HP and Apple registered the highest levels of certain hazardous substances, according to environmental group Greenpeace.

Aside from those by HP and Apple, Greenpeace said in a statement said it tested purchased laptop models from Acer, Dell and Sony. The test was conducted by an independent Danish laboratory, which checked the presence of hazardous substances in a variety of internal and external components.

According to a Greenpeace study, the lab findings on HP’s laptop registered high levels of Polybrominated Diphenylethers (PBDE is a class of Brominated flame retardants or BFRs), including decabromodiphenyl ether (decaBDE) in the fan. Lead was also found in the soldering.

On the other hand, the Apple Macbook registered a concentration of 262 mg/kg of Tetrabromobisphenol A (TBBPA is another class of BFR) in the fan.

“During the sampling process it was remarkable to note that, whether Mac or PC, once you by-pass the sleek and cool design of these computers, hazardous substances are a component common to all,” said Kevin Brigden from the Greenpeace Research Laboratories, who oversaw the sampling analyses and produced the report.

Beau Baconguis, Greenpeace Southeast Asia toxics campaigner, said that developing countries, like the Philippines, are the most imperilled by the backward policies of these electronic companies.

“The absence of a fully-functioning global take-back system means that these contaminated products will find their way to scrap yards in Asia, exposing communities to hazardous substances that electronic companies have neglected to eliminate from their products, properly dispose of, or contain,” Baconguis said.

Greenpeace is calling on the electronics industry to go beyond the European Union (EU) RoHS directive. The EU RoHS Directive (the restriction of the use of certain hazardous substances in electrical and electronic equipment) is intended to reduce the use of substances that may pose risks to human health or the environment.

Greenpeace is also calling on companies to eliminate all hazardous chemicals, including all type of BFRs and Polyvinyl Chloride (PVC) plastic. According to Greenpeace, no company has yet put on the market a product that is clean of all of these chemicals.