Problem: Renewable energy commercialization:

Mark Z. Jacobson, professor of civil and environmental engineering at Stanford University and director of its Atmosphere and Energy Program says producing all new energy with wind power, solar power, and hydropower by 2030 is feasible and existing energy supply arrangements could be replaced by 2050. Barriers to implementing the renewable energy plan are seen to be "primarily social and political, not technological or economic". Jacobson says that energy costs with a wind, solar, water system should be similar to today's energy costs.

What is a barrier to implementing the renewable energy plan?
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A: social and political

Problem: They established communities throughout Central and Eastern Europe, which had been their primary region of concentration and residence until recent times, evolving their own distinctive characteristics and diasporic identities. In the late Middle Ages the center of gravity of the Ashkenazi population, and its traditional cultural life, shifted steadily eastward, out of the German lands into Poland and Lithuania (including present-day Belarus and Ukraine). In the course of the late 18th and 19th centuries, those Jews who remained in or returned to the German lands experienced a cultural reorientation; under the influence of the Haskalah and the struggle for emancipation, as well the intellectual and cultural ferment in urban centers, they gradually abandoned the use of Yiddish, while developing new forms of Jewish religious life and cultural identity.
In the late Middle Ages, as the Ashkenazi population shifted it moved into which location?
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Answer: Poland and Lithuania (including present-day Belarus and Ukraine)

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Alloying copper with tin to make bronze was first practiced about 4000 years after the discovery of copper smelting, and about 2000 years after "natural bronze" had come into general use[citation needed]. Bronze artifacts from the Vinca culture date to 4500 BC. Sumerian and Egyptian artifacts of copper and bronze alloys date to 3000 BC. The Bronze Age began in Southeastern Europe around 37003300 BC, in Northwestern Europe about 2500 BC. It ended with the beginning of the Iron Age, 20001000 BC in the Near East, 600 BC in Northern Europe. The transition between the Neolithic period and the Bronze Age was formerly termed the Chalcolithic period (copper-stone), with copper tools being used with stone tools. This term has gradually fallen out of favor because in some parts of the world the Chalcolithic and Neolithic are coterminous at both ends. Brass, an alloy of copper and zinc, is of much more recent origin. It was known to the Greeks, but became a significant supplement to bronze during the Roman Empire.
When did the Bronze Age began in Southeastern Europe?
A: 37003300 BC

Context and question: Chengdu Hi-tech Development Zone covers an area of 82.5 km2 (31.9 sq mi), consisting of the South Park and the West Park. By relying on the city sub-center, which is under construction, the South Park is focusing on creating a modernized industrial park of science and technology with scientific and technological innovation, incubation R&D, modern service industry and Headquarters economy playing leading roles. Priority has been given to the development of software industry. Located on both sides of the "Chengdu-Dujiangyan-Jiuzhaigou" golden tourism channel, the West Park aims at building a comprehensive industrial park targeting at industrial clustering with complete supportive functions. The West Park gives priority to three major industries i.e. electronic information, biomedicine and precision machinery.
What industry does South Park give priority to?
Answer: software industry

Question: Ireland and the United Kingdom are both part of the European Union (EU). The Crown Dependencies are not a part of the EU however do participate in certain aspects that were negotiated as a part of the UK's accession to the EU. Neither the United Kingdom or Ireland are part of the Schengen area, that allow passport-free travel between EU members states. However, since the partition of Ireland, an informal free-travel area had existed across the region. In 1997, this area required formal recognition during the course of negotiations for the Amsterdam Treaty of the European Union and is now known as the Common Travel Area.
Is there an answer to this question: This free-travel area in Ireland is now called what?

Answer: Common Travel Area

QUES: Much of the early extant evidence for the origins of Mahayana comes from early Chinese translations of Mahayana texts. These Mahayana teachings were first propagated into China by Lokaksema, the first translator of Mahayana sutras into Chinese during the 2nd century CE.[note 39] Some scholars have traditionally considered the earliest Mahayana sutras to include the very first versions of the Prajnaparamita series, along with texts concerning Aksobhya Buddha, which were probably composed in the 1st century BCE in the south of India.[note 40]

Texts concerning Aksobhya Buddha were probably composed in what century BCE?
What is the answer?
ANS:
1st